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发明名称
Mining apparatus with clean-up device
摘要
申请公布号
US2736546(A)
申请公布日期
1956.02.28
申请号
US19490102786
申请日期
1949.07.02
申请人
JOY MANUFACTURING COMPANY
发明人
STEELE EDSON B.
分类号
E21C35/20
主分类号
E21C35/20
代理机构
代理人
主权项
地址
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